"A seven-day expedition deep into the Colombian Amazon searches remote creeks for freshwater fish that may never have been ...

The world’s largest freshwater fish, a 13-foot-long, 661-pound stingray, has been discovered in the Mekong River in Cambodia. Scientists say the animal is a hopeful sign for the river, which faces ...

Harlequin rasboras are common, colorful aquarium fish that carry with them a slightly deceptive name. Once thought to be a type of rasbora fish, studies showed that they were different enough that ...

Some of the longest, most important migrations of species on Earth are happening beneath the surface of the world's rivers and many are rapidly collapsing, according to a major new assessment by the ...

First comprehensive assessment of the world’s freshwater fish species reveals that 25% are at risk of extinction. Climate change threatens a growing number of species, from freshwater fishes to ...

If you liked this story, share it with other people. Migratory freshwater fish have declined by an estimated 81% since 1970 yet remain largely overlooked in global conservation policy. At the latest ...

White cloud minnows are colorful and strong freshwater fish. This adaptable species lives happily in community tanks, small spaces, and outdoor ponds. These traits make them excellent pets for ...

Reaching up to 10 feet (3 meters) long and weighing 440 pounds (200 kilograms), arapaima are the largest freshwater fish in South America—and an important species in the Amazon River ecosystem. Learn ...